Field selection by $:/language

stefan_from_germany · May 17, 2024, 9:51am

do you have also an idea to select the filter from the $./language setting?
My target is that the user select only once the language and the content will be selected automatically.

Stefan

stefan_from_germany · May 17, 2024, 9:52am

Hi @telumire,

good idea, but my target is that the user select only once the language and the content will be selected automatically.

Stefan

FRDV · May 17, 2024, 10:08am

I’m searching a solution, right now I have this :

<$list filter="[all[tiddlers+system+shadows]field:plugin-type/language/] +[removeprefix[$:/languages/]]" variable="available-languages">

<<available-languages>>
</$list>

You might also have a look at $:/snippets/languageswitcher

stefan_from_germany · May 17, 2024, 10:38am

Hi @FRDV,

Excellent! This is separating the right name of the field.
How to get it in “{{ }}” brakets to get the content from the “Tiddler name” in the field?

I think there will be a solution

Stefan

xcazin · May 17, 2024, 1:43pm

hi @stefan_from_germany I believe this is a job for ViewTemplate cascades:

Create a tiddler tagged with $:/tags/ViewTemplateBodyFilter, with the following text field:

       [fields[]] 
:filter[{$:/language}removeprefix[$:/languages/]match<currentTiddler>] 
   :map[<..currentTiddler>get<currentTiddler>]

and a list-before field with an empty value.

That should be enough to fulfill your purpose:

The $:/tags/ViewTemplateBodyFilter blesses your filter as a cascading ViewTemplateBody filter
The empty list-before field puts your filter tiddler on top of the cascade
The text field defines a filter that searches for a field in your main “selection” tiddler that matches the language set in $:/language. If it finds one, the filter result is set to the value of the matching field, otherwise the cascade goes on with the next ViewTemplateBodyFilter.

FRDV · May 17, 2024, 4:12pm

Finally I made it!

Create a field for each language you have a translation

field de-DE value Tiddler (Deutsch)
field en-GB value Tiddler (English)
field fr-FR value Tiddler (Français)

NOTE:

use the dash - between the letters, not the underscore _
[[$:/languages/en-GB]] at the beginning of the filter forces the default language in the list

<$list filter="[[$:/languages/en-GB]] [all[tiddlers+system+shadows]field:plugin-type/language/] +[removeprefix[$:/languages/]]" variable="available-languages">

<<available-languages>> <!-- for demo purpose -->

<$list filter="[<currentTiddler>has<available-languages>get<available-languages>]" variable="thislanguage" >

<$transclude tiddler=<<thislanguage>> />

</$list>
</$list>

Code works in the Tiddler (Whatever)

Have fun!

FRDV · May 17, 2024, 4:31pm

Added emptyMessage="no translation", just for the fun of it

<$list filter="[[$:/languages/en-GB]] [all[tiddlers+system+shadows]field:plugin-type/language/] +[removeprefix[$:/languages/]]" variable="available-languages">

<<available-languages>> <!-- for demo purpose -->

<$list filter="[<currentTiddler>has<available-languages>get<available-languages>]" emptyMessage="no translation" variable="thislanguage" >

<$transclude tiddler=<<thislanguage>> />

</$list>
</$list>

stefan_from_germany · May 21, 2024, 12:23pm

Hi @FRDV,

thank you for your support.
What is ti I am doing wrong here.
I only want to see der german or english tiddler. Not all of them

Here is the code i am using

<$list filter="[[$:/languages/en-GB]] [all[tiddlers+system+shadows]field:plugin-type/language/] +[removeprefix[$:/languages/]]" variable="available-languages">

<$list filter="[<currentTiddler>has<available-languages>get<available-languages>]" emptyMessage="no translation" variable="thislanguage" >

<$transclude tiddler=<<thislanguage>> />

</$list>
</$list>

And here the result

This is English

Dies ist Deutsch

So both Tiddlers are displayed not only the one of the setting in language.

Can you help me here to change it to display only the right tiddler?

Stefan

FRDV · May 21, 2024, 12:34pm

Hi Stefan

For the languages you don’t want to see you only have to:

delete the unwanted field
give NO value to the unwanted field, ie. leaving it empty

stefan_from_germany · May 21, 2024, 12:55pm

Hi @FRDV,

hopefully not
What I am looking for is, the possibility if a user is switching from english to german (or an other language), the content will change automatically, not to have all available langauges displayed the same time.

Is that possible?

Thx
Stefan

FRDV · May 21, 2024, 1:28pm

This should do the trick

<$list filter="[{$:/language!!text}] +[removeprefix[$:/languages/]]" variable="available-languages">
<$list filter="[<currentTiddler>has<available-languages>get<available-languages>]"  emptyMessage="no translation for {{$:/language}}" variable="thislanguage" ><$transclude tiddler=<<thislanguage>> />
</$list>
</$list>

EDIT: changed the emptyMessage to indicate the language of a missing translation

FRDV · May 21, 2024, 1:47pm

NOTES:

you can change

{$:/language!!text} to {$:/language} (same thing but shorter)
all available-languages to available-language (because there is only one language)

linonetwo · May 21, 2024, 5:14pm

Core feature: feat: t macro and docs by linonetwo · Pull Request #7821 · Jermolene/TiddlyWiki5 · GitHub

Just use lingo precedure, see Docs in Preview site

FRDV · May 21, 2024, 6:44pm

first link you gave

filter="[[$:/language]get[text]get[name]else[en-GB]]"

Nice!

I saw that field name in $:/languages/ but somehow I was too focused on removing the prefix that I didn’t use it! Seems I did it the hard way

Question:

In this code below

<$set name="lang" filter="[[$:/language]get[text]get[name]else[en-GB]]" select="0">
<<lang>>
</$set>

what is the use of select="0"?

<$set name="lang" filter="[[$:/language]get[text]get[name]else[en-GB]]" >
<<lang>>
</$set>

Whatever language I select in control panel I get the same result: the name of the selected language

second link

I have already looked at that before and I don’t understand how the lingo procedure works, the given example are very obscure to me.

Someday I will have a closer look under the hood.

Thank you for your advices.

stefan_from_germany · May 21, 2024, 9:47pm

Hi @xcazin,
I was not able to reproduce your solution.
Here is the result tiddler:

de-DE: Tiddler (Deutsch)
en-GB: Tiddler (English)
tags: $:/tags/ViewTemplateBodyFilter
title: Result 1

[fields[]] 
:map[{$:/language}removeprefix[$:/languages/]match<currentTiddler>] 
:and[!is[blank]] 
:map[<..currentTiddler>get<currentTiddler>]

And this is the returned (screenshot)

Stefan

stefan_from_germany · May 21, 2024, 10:08pm

SUMMARY OF SOLUTION!!!

The RESULT tiddler has fields named in the same way as the selected language for translated content.
1a. Field en-GB : Tiddler (English)
1b. Field de-DE : Tiddler (Deutsch)
The content itself is available in different tiddlers.
2a. German content stored in Tiddler (Deutsch)
2b. English content stored in Tiddler (English)

This is the RESULT TIDDLER

de-DE: Tiddler (Deutsch)
en-GB: Tiddler (English)
modified: 20240521215629308
modifier: myself
tags: 
title: Result

<$list filter="[{$:/language}] +[removeprefix[$:/languages/]]" variable="selected-language">
<$list filter="[<currentTiddler>has<selected-language>get<selected-language>]"  emptyMessage="no translation for {{$:/language}}" variable="thislanguage" ><$transclude tiddler=<<thislanguage>> />
</$list>
</$list>

This is the tiddler containing the german content

created: 20240515103643289
creator: myself
modified: 20240521213929186
modifier: myself
tags: 
title: Tiddler (Deutsch)

Dies ist Deutsch!

This is the tiddler containing the english content

created: 20240515103657992
creator: myself
modified: 20240516073520956
modifier: myself
tags: 
title: Tiddler (English)

This is English

If you switch the language now the content in the “Tiddler /(Deutsch)” or “Tiddler (English)” will be shown.
For me it is acceptable nevertheless that the title, date and author information will not be displayed if the language will be switched.

Special thanks to @FRDV
Stefan

Scott_Sauyet · May 21, 2024, 10:08pm

You’ll need to wrap that filter in something, a text widget, or {{{ ... }}}.

stefan_from_germany · May 21, 2024, 10:14pm

Hi @Scott_Sauyet,

If I do this this is the result:

Stefan

Scott_Sauyet · May 21, 2024, 10:17pm

From the code, I thought that was the goal. I must admit I haven’t read everything thoroughly, but it looked as though you wanted to use the various fields in the current tiddler along with the $:/language tiddler to choose which content to show, which is precisely what this does.

But it seems you want to grab the text of a tiddler. You can just extend it with get[text]"

{{{ [fields[]] 
:map[{$:/language}removeprefix[$:/languages/]match<currentTiddler>] 
:and[!is[blank]] 
:map[<..currentTiddler>get<currentTiddler>get[text]] }}}
<!--                                      ^^^^^^^^^   -->

xcazin · May 22, 2024, 9:35am

Hi @stefan_from_germany, the beauty of ViewTemplate cascades is that once you figure out the right filter, you don’t have to modify the tiddlers in your story: they display automagically the way you want.

In the site below, I’ve embedded the very tiddlers of your original post (I couldn’t resist to add an fr-FR field to your Result tiddler, but they are otherwise unchanged), plus my (simplified) cascade filter tiddler, plus a few payload tiddlers to show how ViewTemplate cascades solve your problem in a generic way.

Go to the demo site with relevant tiddlers.
See how the ViewTemplate cascade found out that the current language was de-DE and changed the ViewTemplate of the Result tiddler accordingly
Use the side bar to switch between languages
Go to the ControlPanel to see the new ViewTemplateBodyFilter tiddler on top of the cascade.

Note that it is also possible to use the ViewTemplate cascade mecanism to localise the display of the title as well. For this, the magic tag to use is $:/tags/ViewTemplateTitleFilter. As an example, I’ve added a filter tiddler that calls a template Template for localised title substitution to replace the Result title if the content tiddlers have a localised title field.

In both cases, the underlying tiddler Result is never modified: only the way it is viewed in the story river.